Tension grip



Nov. 24, 1925- 1,563,036

7 F. M ALEEsE 'rausron GRIP.

Filed Jamv 31, 1920 IN V EN TOR.

ATTORNEY.

Patented Nov. 24, 1925.

UNITED s'rarss PATENT OFFICE.

FREDERIC L. MACALEESE, MILW AUKEE, WISCONSIN, ASSIGNOR, BY MESNE AS- SIGNMENTS, TO THE FISK RUBBER COM?ANY,' F CHICOIEE FALLS, MASSACHU- SETTS, A CORPORATION OF MASSACHUSETTS.

TENSION GRIP.

Applicationfiled January 31, 1920. Serial No. 355,406.

To all whom it may concern. 1.

Be it known that I, Fsuonnro L. Mac- Annitsu, a citizen of the United States, residing at Milwaukee, county of Milwaukee, State of Wisconsin, have invented certain new anduseful Improvements in Tension Grips, of which I declare the following to be afull, clear, and exact description.

My present invention relates to a tension grip especially adapted for use in winding rags upon rubber tubes prior to the vulcanization'ofthe same.

It has for its object a grip which will insure the ready 'maintenanceof the desired degree of tension ofthe rags. y

It has for a further object a grip which ,will enable the operator to regulate orrelease the tension at will. i

It has for a further object variousconstructional advantages and improvements in operating methods which will be apparent fromthefollowing specification and the appended claims. i i i In the manufacture of rubber tubing such as inn-er tubes for pneumatic tires it is customary to wrap the tube hielically; with rags or strips of cloth prior to vulcanization. These rags have been usually supplied wound upon a short length of pipe which is held in the hands of the operator during the windingiprocess. The rags passfrom the pipe overguides parallelto the mandrel on which the tube is mounted andthe slip of the rags on the pipe or of the pipe in the operators hands,"together.with the fIlOlJiOIl Of the guides, glves the necessary.

tension. It can readily be seen that the tension thus produced is'uncertain and subject to considerable variationpi It is the object of my invention toprovidea tension grip which will enable the old process to be carried out more expeditiously and with surer CODEIOl over thetension.

By the ordinary method it requires a great amount of pressure by the operators hands 7 ,to get the desired tension,which causes fatigue, and the tendency to relax this pressure causes thewrapper to run freely without tension, thereby greatly increasing the possibility making imperfect goods on better product on account of the account of lack of pressure in the cure. By th1s invention any required tension may be obtained without fatigue by a slight movement of the hands, thereby securing a much uniformity of pressure applied. My invention will now be described with particular reference to thexaccompanying drawings, in which Fig. 1 is a plan view showing the improved tension grip 1n use;

Fig. 2 is a longitudinal section ofthe rag holding sleeve;

Fig. 3 is an elevation of the tension grip with the rag holding sleeve removed and with "certain other parts partially broken Fig". 4: is a. transverse section on line H of Fig. 3; and i a Fig, 5 is a longitudinal section through the complete device, showing the rags in position.

The device comprises which the rags 11 are wound, and which is mounted for frictionally restrained rotation 'as will now be described. Toa short shaft 12 are fixed handles 13 and 14, as by set screws 15 and 16. Loosely mounted on shaft 7 12 between the two handles 13 and 14 is a releasing handle 17. Mountedupon handles '17 and 14: are collars 18-and 19 respectively,

gagement with a branched slot-.26. Lubrication is provided for by a screw 27 in a plug 28 in the end of handle 14-. Oil or grease inserted through the opening presented by the removal of this screw will find its way in side sleeve through oil holes 29.

The operation of the device is as follows: A rubber or other tube 30 to be wrapped is placed on a mandrel 31 and a sleeve 10 with a supply of rags 11 in place is positioned on sleeve 20 by engaging slot 26 with screw25.

Th6 1169, of the rag strip is caught a .sleeve 10, upon at 24 to hand'le17. A projection 25, such as a set'screw, on sleeve 20 serves to hold the sleeve 10 releasably in position through en ary. with which the rag strip is being delivered around the mandrel 81, the handles 13 and 14 grasped by the operator, and the mandrel set in rotation in the direction of the arrow. The rotation of the mandrel will wind; on the rag strip, unwinding it from sleeve and turning the latter, together with the sleeve inthe direction of the arrow applied theretoin Fig. 1. It will readily be seen from an inspection of Figs. 3 and t that as the sleeve rotates, its contact with friction band 2122 will cause the latter to tend to move, or pile up, as it were, towards the end secured to handle l t. As this motion is prevented by handle 14 being held stationary the friction band will be. forced outwardly against the interior ofisleeve 20,

thus increasing the frlction to a definite limit determinedby the slippage of the friction band on the sleeve. It is desirable to have band 521 made of spring material. so that it Will normally press outwardly against the interiorot the sleeve Wit-hsui'ficient force to start the cycle of operations above described.

It will be understood that durii'ig this cyclereleasing handle 17 will have a slight initial rotation in which it will accommodate itself to the changed position of the friction band as the latter expands -as described, and will thereafter remain station If it is desired to reduce the tension the operators left hand is moved onto handle l7 and the latter is turned relatively to handle 14 in the directionof the arrow in Fig. 3. This Winds up band Qlslightly, i'noving its friction surface 29. away tr n interior of sle ve 20 and obviouslyreducing th resistance to rotationofthelatterto any desired'degree. like ejfifeet maybe produced by holding handle 17 firmly and al loiying han'dle it to turn under the illlllb' enceot the friction sleeve QOtransmitted througn band 91 90 By turninghandle 17 in a direction opposite to that of the arrow in Fig. 3 a greater tension-than the normal may be imposed on the rag strip.

' I realize that changes may be made in the structure and method of use set fortlrabovc Without departing from the spirit-oi my invention, and desire to cover the latter in its broad as ell as its specific aspe t in the appended claims,

careby Letters Patentis:

l. A device of the character described comprising a pair of handles, a releasing handle rotatablejwith respect to the first named handles, a helically wound friction I hand one end of which is secured to-oneot the first namedhandles and the other to the releasing 'handle,'a sleeve inclosing the triction band and secured against axial motion relativethereto, and a holding sleeve releasably secnred't'o the first mentioned sleeve.

2. A device of the character described comprising a pair of handles, a releasing handle rotatable With respect to the first named handles, .a hclically Wound; friction hand, one end of which is secured to one of the first. named handles and the other to the releasing. lrandle,,.ainl a sleeve inclosing the friction band.

3. A devicewot the characterdescribed comprising a handle, a helically Wound triction band having one end secured thereto, a sleeve encircling the friction band and being rotatable-with respect thereto, and means for expanding and contracting the friction band. i 1

4:. A device of the character described comprising a handle, a sleeve mounted for rotation, and means operable either automatically or manually for causing and regulating resistance against rotation oi said sleeve.

5. A device of the character described comprising a handle, a sleeve rotatable with respect to said handle, meansfor causing resistanceto rotation thereof, and a rag strip retaining sleeve detachably mounted on said first named sleeve.

6. In combination, a pair of handles as sembled to permit relative-movement there betweema sleeve rotatably mounted there on, and means carried by said handles adapted to resist rotation of said sleeve and controlled by said "relative movement.

7.111 combination, a pair othandles assembled to permit relative movement therebetween, a sleevei'otatably mounted thereon, and means carried by said --handles-w1thm saidsleeve adapted to TGSlSt- 'lOtQlI-lOll of said sleeve and contr'olled'by said: relative more in ent-. I

8.11'1'comb1natron, a pair of handles as sembled to permit relative movement there handles ithin said sleeve adapted to bear What I claim as new agidjdeslre to seagainst the inside-0t said sleeve to resist ro tatio'n thereof? controlled by said rela t-ive' movement V I 101111 combinatioma pair of handles assembled to permit relative rotation therebetween, a slecve-rotatably mounted thereon, and meansoarried by said handles adapted to resist rotation of said sleeve and controlled by-said relative rotation. V 11. In'combination, a pairof handles assembled to permit relative rotation there.- between, a sleeve rotatably mounted thereon,

and a helical brake band mounted between said handles adapted to resist rotation of said sleeve and controlled by said relative rotation.

12. In combination, a pair of handles assembled to permit relative rotation therebetween, a sleeve rotatably mounted thereon,

and a helical brake band mounted between said handles Within said sleeve adapted to bear against the inside of said sleeve to re- 1 sist rotation thereof and controlled by said relative rotation.

FREDERIG L. MAOALEESE. 

